Osisko Mining Corp.

DDH 368 intersects 9 metres averaging 17.3 g/t Au included within 84 metres averaging 2.78 g/t Au

MONTREAL, QUEBEC -- (Marketwire) -- 08/12/10 -- Osisko Mining Corporation ('Osisko')(TSX: OSK); (FRANKFURT: EWX) and Brett Resources Inc. ('Brett', BBR - TSX.V) are pleased to announce results from two exploratory step-out holes at the ongoing drilling program at Hammond Reef, located in western Ontario. Highlight drill hole BR-368 intersected 9 metres averaging 17.36 g/t Au, included in a larger intercept of 84 metres averaging 2.78 g/t Au. The Hammond Reef project is 100 percent owned by Brett, which is currently 77.2% held by Osisko and being fully acquired as a result of the recent all-stock bid.

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Osisko Mining and Brett Resources are pleased to announce that their previously announced Plan of Arrangement has been approved by the shareholders of Brett at a special meeting of Brett shareholders held on August 11, 2010. On August 12, 2010, the Supreme Court of BC issued a final order approving the Arrangement. The Arrangement is expected to become effective on or about August 13, 2010. The common shares of Brett [...]

MONTREAL, QUEBEC -- (Marketwire) -- 08/10/10 -- Osisko Mining Corporation (the 'Company' and 'Osisko') (TSX: OSK)(FRANKFURT: EWX) is pleased to report its second quarter financial results for the period ended June 30, 2010.

Highlights

--  Acquisition of 77% interest in Brett Resources Inc. and its Hammond
    Reef Project;

--  Continued progress on the construction and development of the Canadian
    Malartic

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Please note that a map is available with this press release.

MONTREAL, QUEBEC -- (Marketwire) -- 08/09/10 -- Osisko Mining Corporation ('Osisko') (TSX: OSK)(FRANKFURT: EWX) and Brett Resources Inc. ('Brett') (TSX VENTURE: BBR) are pleased to announce results from the ongoing drilling program at Hammond Reef, located in western Ontario. The Hammond Reef project is 100 percent owned by Brett, which is currently 77.2

[...]

MONTREAL, QUEBEC -- (Marketwire) -- 08/09/10 -- Osisko Mining Corporation ('Osisko') (TSX: OSK)(FRANKFURT: EWX) and Brett Resources Inc. ('Brett') (TSX VENTURE: BBR) are pleased to announce results from the ongoing drilling program at Hammond Reef, located in western Ontario. The Hammond Reef project is 100 percent owned by Brett, which is currently 77.2% held by Osisko and being fully acquired by Osisko as a

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MONTREAL, QUEBEC -- (Marketwire) -- 08/05/10 -- Osisko Mining Corporation ('Osisko') (TSX: OSK)(FRANKFURT: EWX) and Clifton Star Resources Inc ('Clifton') (TSX: CFO)(FRANKFURT: C3T) are pleased to announce results from twenty-six additional holes from the 2010 drill program at the Duparquet Project, located in the Abitibi region of Quebec. Drilling is focused on three properties: Beattie, Donchester (eastern

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MONTREAL, QUEBEC -- (Marketwire) -- 07/15/10 -- Osisko Mining Corporation ('Osisko') (TSX: OSK)(FRANKFURT: EWX) is pleased to announce initial results from the 2009-2010 definition drill program on the Western Porphyry Zone, located on Osisko's 100%-owned Amphi property immediately adjacent to the Canadian Malartic property, and approximately 1.8 km northwest of the crusher and the 55,000-tpd mill currently being

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Brett Resources Inc. and Osisko Mining Corp. are pleased to announce that they have commenced the necessary steps to allow Osisko to acquire all of the remaining common shares of Brett that it does not currently hold. In order for Brett to become a wholly-owned subsidiary of Osisko, the two companies have entered into an arrangement agreement pursuant to which they intend to complete a business combination by way of [...]

MONTREAL, QUEBEC -- (Marketwire) -- 07/13/10 -- Osisko Mining Corporation ('Osisko') (TSX: OSK) (FRANKFURT: EWX) and Brett Resources Inc. ('Brett') (TSX VENTURE: BBR) (FRANKFURT: A4N) are pleased to announce that they have commenced the necessary steps to allow Osisko to acquire all of the remaining common shares of Brett that it does not currently hold. In order for Brett to become a wholly-owned subsidiary of

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MONTREAL, QUEBEC -- (Marketwire) -- 07/05/10 -- Osisko Mining Corporation ('Osisko)(TSX: OSK)(FRANKFURT: EWX) is pleased to report the adoption of a shareholders rights plan which was approved by 94.1% of shareholders at the June 30, 2010 Annual and Special Meeting of the corporation.